AN910 datasheet(18/51 Pages) STMICROELECTRONICS

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ST7 AND ST9 PERFORMANCE BENCHMARKING

5.4 ST9+ MCU TOOLS

5.5 ST9 MCU TOOLS

5.6 H8/300 MCU TOOLS

Hardware tools

ST90R192 chip

Circuit Real Time Emulation System ST9+ HDS2 (Hardware Development System 2)

The PLL clock has been used (see configuration in assembly codes)

Software tools

The GNU C Toolchain (GCC9) for the ST9+ is used to assemble the code sources (in assembler

language). The command line with its options is:

gcc9 -v -g -c -o 'name'.o 'name'.st9

Then it is linked with the linker LD9:

ld9 -I -i -m -Tdata 0x10000300 -o 'name'.u 'name'.o

To debug the program, the Windows Debugger WGDB9xxx for ST9+ is used together with the

emulator. Here, the configuration file hardware.gdb is the following one:

clear_map

map 0x000000 32 sw

map 0x008000 16 sr

Hardware tools

ST90R50 chip

Circuit Real Time Emulation System ST9 HDS2 (Hardware Development System 2)

Software tools

The GNU C Toolchain for ST9 is used. The options are the following ones:

gcc9 -v -g -c -o 'name'.o 'name'.st9

ld9 -I -i -m -Tdata 0x10000300 -o 'name'.u 'name'.o

The Windows Debugger WGDB9xxx is used with the configuration file hardware.gdb :

bankswitch off

pd_signal used

sdb sr ea 3<<2

sdb sr fc 08

sdb sr fd 08

sdb sr fe 00

# Mapping of memory

map p:0x0000 0x7FFF SR

map D:0x0000 0x7FFF SW

Hardware tools

H8/330 chip

LEV8330 evaluation board

Default jumpers’ settings have been kept.

Note that the code was placed on external memory (the size of internal RAM is limited to 512

bytes). As the access to external memory is 3 times longer than the access to internal memory,

the measured execution time results have been corrected. For each test, a value, equals to

(200ns x number of bytes executed), has been subtracted (200ns for each byte of code).

Actually, only the instruction fetch was wrong, and it lasted 300ns instead of 100ns for each byte.

Software tools

The Eurodesc H-series Interface Software (INTFC3) allows the user to communicate with the

Hitachi's Executive Monitor System (EMS) located on the development board. It uses a DOS

environment.

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